In this atmosphere, it is not uncommon for this military factory, located on a mountain corner, to have American equipment.

Since the founding of the People's Republic of China, the workers of our factory have a "good habit" of understanding the imported equipment: as long as the equipment comes in, the first action is to disassemble it comprehensively, and everyone works overtime to analyze and understand the equipment, survey and map the paper, so that the technician can fully understand its principle. Not only let them know how to operate, but also know how to maintain, and when necessary, they can also imitate - cottages.

Many times when foreign experts come to guide the operation of the equipment not long after the equipment is installed, they often drop their jaws in surprise: how can these Chinese, who really have little level, be so smart and can operate the machine flexibly and freely at the beginning of training? If something goes wrong, sometimes you even know the reason?

So much so that when they go back, the most common word they say is: mysterious. Mysterious Country, Mysterious People, Mysterious ......

It is common to see such reports in the media that foreigners give Chinese workers a thumbs up for something and sincerely praise the Chinese for their greatness.

Naturally, this milling machine, which was imported from the United States, suffered the same fate and was dismembered by the workers! A good piece of equipment is now a pile of parts.

To the embarrassment and anxiety of the workers, they are now unable to assemble them back, and after trying for a long time, they are still a bunch of parts. Now everyone is anxious: if the American technician comes to this situation in the afternoon, where will the faces of our workers be placed? Isn't this a smear to the party and the country? Disgrace to the Chinese, this is a political incident.

Deputy Chief Engineer Huang's technology is first-class in the factory, and he has participated in the disassembly and assembly of foreign equipment many times, and everyone is looking forward to his early return and early action.

Deputy Chief Engineer Huang did not rush forward immediately, but asked calmly: "Your surveying and mapping is ready, is the flow chart correct?" ”

Director Tao's head was like a chicken pecking rice, and he hurriedly said, "It's painted, it's painted." But that sleeve just can't be installed, the tolerance fit is too tight, and it's a moving part, so it can't work. We started assembling it yesterday afternoon, but it hasn't been installed yet, so I'm really in a hurry. ”

Deputy Chief Engineer Huang asked again: "Have you reported to the factory leaders?" ”

Director Tao hurriedly said again: "Report." The people from the chief engineer's office also came, and they tried for a long time but couldn't do anything, and they all said that they had to wait for you to come back. We were worried that you were eating and resting on the road, but we waited for you. ”

Hearing that it had been reported to the factory leaders, Deputy Chief Engineer Huang quickened his pace and walked through the passage given by the workers: even if he went out by himself, he didn't install it, and the leaders had nothing to say.

Guo Zhuocheng felt that this Deputy Chief Engineer Huang was very steady, not completely like a pure intellectual.

He followed, wondering what the hell was going on. When the people in the workshop saw that he was brought by Deputy Chief Engineer Huang, they didn't say anything, so they let him, a child, stand in the crowd.

An old worker standing next to the parts pointed to a part on the oiled paper with a ashamed face and said, "Chief Engineer Huang, this is the thing." The fit between the sleeve and the shaft is too high. The sleeve has only a deviation of 0.3 filaments, and the measured value of the shaft is on the nominal value with almost no error. ......, you, the most troublesome thing is the nine hemispheres inlaid here. They are not on the same plane, and if you force them down, they will be pressed by the spring inside, and they will not be able to move. We've tried countless times but it didn't work. ”

A middle-aged man angrily picked up the sleeve from the ground that was as smooth as a mirror inside and out, and said, "Chief Engineer Huang, you American devil is so bad. It also has three grooves machined inside. Even if we press down on the top three hemispheres, the sleeve will be stuck fifty millimeters down. Isn't this a deliberate attempt to make things difficult? ”

Guo Zhuocheng felt a little amused by his angry appearance, as if they secretly dismembered other people's equipment, as if they made a mistake when the parts they designed were complicated.

His anger made the other workers agree with him, and one by one they expressed their indignation against the Yankees:

"Damn, the Yankees are so vicious."

"I didn't do that. How is this possible to fit in? It's just unreasonable. ”

"Even immortals can't be. Unless it can get in. ”

Guo Zhuocheng smiled secretly: Maybe people are just a technical trap set up to prevent others from copying.

Deputy Chief Engineer Huang carefully took the sleeve, and after a moment, his brows tightened.

Everyone is a technician, so naturally we know the difficulty: the sleeve and the shaft fit so tightly that there is almost no clearance, if there are no hemispheres, there is no spring, even the interference fit can be loaded in, but with these hemispheres it is troublesome, they can get the sleeve stuck through the grooves inside the guò.

"Chief Engineer Huang, is there a way?" Director Tao asked worriedly. If you really want to lose the face of the country, the first person to be punished is him, the workshop director, although his behavior has been supported by the factory leaders, and dismantling the machine tool is also a common practice in the factory.

Deputy Chief Engineer Huang didn't say no, but asked, "What methods have you taken?" ”

The old worker said, "There are many solutions, but none of them are practical. Chief Engineer Huang, here are a few assembly tools we designed, and it is useless to use a semi-circular jacket to clamp the hemisphere. ”

Even Guo Zhuocheng, an outsider, thinks that this method is very ingenious: first drive a cylinder with the same inner diameter as the sleeve, and then cut it in half, and weld screw holes for fixing on both sides. Tighten the bolts and nuts on those hemispheres first, wait for the real sleeve to be inserted into place, and then loosen the clamp and move it down.

Deputy Chief Engineer Huang also thought of this method in his mind just now, but it was not as comprehensive as the old worker's thoughts. He scratched his hair and asked, "Then how did you remove it?" ”

Generally speaking, it can be disassembled and installed, and at most it is necessary to pay attention to many conditions.

The angry middle-aged man said: "It's very simple to dismantle, just use the card clip directly on the milling machine to force it out." This may be because these hemispheres and springs are pressed back into the positioning holes by the hydraulic oil after the pressure oil circuit is connected inside, so that the grooves do not get stuck. However, this space is too small to fit into the card holder, and if you don't assemble them in advance, you can't enter this small space at all. ”

It's almost a matter of egg or chicken: the sleeve and shaft are likely to fit in a small space. But they have to be installed to get into a small space.

If this statement made Deputy Chief Engineer Huang still have a bit of luck, the words of the old worker completely destroyed a little bit of his confidence.

The old worker shook his head and said, "Even if you go in, there is only a 30 percent chance that it will be installed." Because their mating clearance is so small, they can only be forced against the shaft. However, if you do this, you will definitely damage the sleeve. Even if it is able to operate, its machining accuracy is reduced by at least an order of magnitude. The bed became a waste. ”

An order of magnitude is only one-tenth of the original!! ~！